Ultrafine particle size distributions measured in aircraft exhaust plumes
نویسندگان
چکیده
منابع مشابه
Dilution of Aircraft Exhaust Plumes at Cruise Altitudes
The dilution of jet engine exhaust in the plume behind cruising aircraft is determined from measured plume properties. The data set includes in situ measurements of CO 2 , NO, NO y , SO 2 , H 2 O, temperature, and contrail diameters behind subsonic and supersonic aircraft in the upper troposphere and lower stratosphere, for plume ages of seconds to hours. The set of data is extended into the ra...
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Ultrafine vehicular particle (<100 nm) number size distributions presented in the literature are mostly averages of long scan-time (∼30 s or more) spectra mainly due to the non-availability of commercial instruments that can measure particle distributions in the <10 nm to 100 nm range faster than 30 s even though individual researchers have built faster (1–2.5 s) scanning instruments. With the ...
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We briefly describe a model which seems to be applicable to a variety of coalescence growth systems. Spanning cluster growth, particle growth and hillockformation in thin metal f%ns, this model is based on the Smoluchowski kinetic equations and fractals. We describe how this model has been able to suggest the e$ect of translational to internal energy conversion in coalescing systems in determin...
متن کاملMeasurements of HONO, NO, NOy and SO2 in aircraft exhaust plumes at cruise
[1] Measurements of gaseous nitrogen and sulfur oxide emissions in young aircraft exhaust plumes give insight into chemical oxidation processes inside aircraft engines. Particularly, the OH‐induced formation of nitrous acid (HONO) from nitrogen oxide (NO) and sulfuric acid (H2SO4) from sulfur dioxide (SO2) inside the turbine which is highly uncertain, need detailed analysis to address the clima...
متن کاملThe role of HOx in super - and subsonic aircraft exhaust plumes
The generation of sulfuric acid aerosols in aircraft exhaust has emerged as a critical issue in determining the impact of supersonic aircraft on stratospheric ozone. It has long been held that the first step in the mechanism of aerosol formation is the oxidation of SO2 emitted from the engine by OH in the exhaust plume. We report in situ measurements of OH and HO2 in the exhaust plumes of a sup...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research: Atmospheres
سال: 2000
ISSN: 0148-0227
DOI: 10.1029/2000jd900360